Participant registry
Persistent IDs, language, contact preferences, recontact permissions, wave status, and restricted identity fields.
Explore capabilityLongitudinal & Case Research
Follow people, households, organizations, and outcomes across time
Use participant registries, persistent case IDs, contact history, wave scheduling, consent renewal, attrition tracking, incentives, nested records, and repeat measures without exposing identity to every collaborator.
Participant ST-982719
BaselineJan 2026
3 monthsApr 2026
6 monthsDue Aug 2026
12 monthsPlanned
Case relationships
Households to people, schools to students, facilities to visits, customers to transactions, and other nested research structures.
Explore capabilityWave scheduling
Baseline, follow-up, reminders, missed windows, callbacks, attrition reasons, and next-contact dates.
Explore capabilityRepeated measures
Reuse stable variables across waves while preserving questionnaire and translation versions.
Explore capabilityConsent renewal
Track permission changes, withdrawal, future contact, secondary use, and data handling choices by version.
Explore capabilityChange over time
Analyze participant and cohort trajectories with longitudinal weights, attrition indicators, and mode metadata.
Explore capabilityContact attempts
Coordinate follow-up without losing context
AttemptDateModeResult
1Aug 17PhoneNo answer
2Aug 18SMSCallback requested
3Aug 20CATICompleted
Attrition monitoring
Understand who disappears from the panel
- Wave-by-wave retention
- Attrition by population segment
- Contactability and refusal reasons
- Mode changes between waves
- Longitudinal weighting flags
- Participant withdrawal and do-not-contact enforcement
Keep the study connected across waves
Use persistent case structure and controlled identity data to preserve context without weakening privacy.